The Asian Development Bank says governments and people in the region should tighten their belts in the wake of the global financial crisis.
The world's financial markets are in trouble, after many banks invested heavily in the huge US mortgage market that's in crisis.
The ADB says Pacific Islands countries will not feel the pinch of the crisis at the moment, because they are not exposed to the US institutions that are at risk.
But its regional director, Eugene Zhukov, says there'll be an effect over time.
"I don't think in the short term there's been a significant impact on the financial crisis in the Pacific, but if the crisis persists, some of the countries will be affected more than others, some countries which rely a lot on remittances, like Tonga and Samoa, may be affected, as well as countries which rely on tourism."
Eugene Zhukov adds the impacts will also be worse in nations that rely on income from international property or equity markets, such as Kiribati or Tuvalu.